<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>D3 Map</title>
    <style>
        text {
            cursor: pointer;
        }
    </style>
</head>

<body>
    <div id="app"></div>
    <script src="https://d3js.org/d3.v4.min.js"></script>
    <script charset="utf-8">
        var projection = d3.geoMercator().scale(750).center([101, 42]);
        var path = d3.geoPath().projection(projection)
        var map = d3.select("#app").append("svg").attr("width", 1000).attr("height", 680)

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                        "id": "31",
                        "size": "7500",
                        "name": "上海市",
                        "cp": [
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                            31.2891
                        ],
                        "childNum": 19
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                        "type": "Polygon",
                        "coordinates": [
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                                [
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                                [
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                },
                {
                    "type": "Feature",
                    "properties": {
                        "id": "81",
                        "size": "18000",
                        "name": "香港特别行政区",
                        "cp": [
                            114.1178,
                            22.3242
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                        "childNum": 1
                    },
                    "geometry": {
                        "type": "Polygon",
                        "coordinates": [
                            [
                                [
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                                [
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                                    114.6094,
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                        ]
                    }
                },
                {
                    "type": "Feature",
                    "properties": {
                        "id": "82",
                        "size": "27",
                        "name": "澳门特别行政区",
                        "cp": [
                            111.5547,
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                        "childNum": 1
                    },
                    "geometry": {
                        "type": "Polygon",
                        "coordinates": [
                            [
                                [
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        }

        // 创建地图
        map.selectAll("path")
            .data(china.features)
            .enter()
            .append("path")
            .attr("stroke", "#fff")//设置边线颜色
            .attr("stroke-width", 1)//设置边线宽度
            .attr("fill", "#b6c9f7")//设置填充颜色
            .attr("d", path)
            .on("mouseover", function (d, i) {//设置鼠标悬浮样式
                d3.select(this)
                    .attr("fill", "#778de6");
            })
            .on("mouseout", function (d, i) {//设置鼠标离开样式
                d3.select(this)
                    .attr("fill", "#b6c9f7");
            });

        var nameArray = [];
        var local = [];
        for (var i = 0; i < china.features.length; i++) {
            if(china.features[i].properties.name) {
                nameArray.push(china.features[i].properties.name);
                local.push(china.features[i].properties.cp);
            }
        }
        // 投影函数
        var projection = d3.geoMercator()//投影方式
            .center([101, 42])//设置中心位置，数据是指经纬度
            .scale(720)//设置放大比例
            .translate([480, 270]);//设置平移
        let dataList = []
        for (var j = 0; j < nameArray.length; j++) {
            var localPosition = projection(local[j]);
            dataList.push({
                localPosition: localPosition,
                name: nameArray[j]
            })
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        // 绘制地区文字
        map.selectAll('text')
            .data(dataList)
            .enter()
            .append('text')
            .attr('x', d => {
                return  d.localPosition[0];
            })
            .attr('y', d => {
                return d.localPosition[1];
            })
            .attr('font-size', '12px')
            .text(d => {
                return d.name;
            })
            .on("mouseover", function (d, i) {//设置鼠标悬浮样式
                d3.select(this).attr('font-size', '16px')
            })
            .on("mouseout", function (d, i) {//设置鼠标离开样式
                d3.select(this).attr('font-size', '12px')
            })
            .on("click", function (d, i) {//设置鼠标离开样式
                alert(`点击了${d.name}`)
            });

        // 绘制坐标点
        const circleList = JSON.parse(JSON.stringify(dataList.splice(0, 20)))
        map.selectAll('circle')
            .data(circleList)
            .enter()
            .append('circle')
            .attr('cx', d => {
                return  d.localPosition[0];
            })
            .attr('cy', d => {
                return d.localPosition[1];
            })
            .attr('r', 10)
            .attr('fill', 'red')
            .attr('fill-opacity', 0.4)

    </script>
</body>

</html>